没心没肺是洒脱
[méi xīn méi fèi shì să tuō]
'Being heartless is a kind of freedom'. It shows an appearance of indifference and carefree. Those using this might actually cover up deep emotions or pain by pretending nothing really touches them deeply. Inside, there might have been numerous unspoken stories and emotions, hidden away. They could believe showing toughness and detachment offers peace from getting hurt.